Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for using frequency resources in a multi-cell communication system, the method comprising: using, by a base station corresponding to each cell included in the multi-cell communication system, frequency resources based on a preset segment sequence; dividing each of the available frequency bands into a series of partial bands based on a basic frequency reuse factor; setting a reference frequency loading factor by using a basic frequency reuse factor; defining a quasi-orthogonal fundamental band, which does not cause interference with adjacent cells at the reference frequency loading factor or less, from among the series of partial bands according to each cell; determining an allocation sequence so that the quasi-orthogonal fundamental band is first allocated according to each cell; and allocating the partial bands to each cell according to the allocation sequence upon a service request from a user, wherein available frequency bands of each cell are equal to each other, each of the available frequency bands is divided into “A” number of segments, each segment is divided into “B” number of partial bands, each partial band is divided into “C” number of channels, and the segment sequence represents an order in which the “A” number of segments are used.
2. The method as claimed in claim 1 , wherein sizes of the partial bands are the same in each cell, and sizes of the segments are the same in each cell.
3. The method as claimed in claim 1 , wherein, when the “B” corresponds to an integer of two or more, the two or more segments exist in one of physically continuous positions and physically discontinuous positions.
4. The method as claimed in claim 1 , wherein, when the “C” corresponds to an integer of two or more, the two or more channels exist in one of physically continuous positions and physically discontinuous positions.
5. The method as claimed in claim 1 , wherein the segment sequence is determined by using a frequency reuse factor and a sectorization factor.
6. The method as claimed in claim 1 , wherein segments first used by the respective cells are orthogonal to each other between adjacent cells or sectors.
7. The method as claimed in claim 1 , wherein, when all the partial bands have an equal size, the reference frequency loading factor is defined by an equation, Reference Loading Factor = FRF + 1 M × FRF { FRF = i 2 + i · j + j 2 M = 2 , 3 , 4 , … i , j = 1 , 2 , 3 , … , in which “M” functions as a reference for band division, and is defined as an integer of two or more, and “FRF” denotes a basic frequency reuse factor.
8. The method as claimed in claim 1 , wherein, when all the partial bands do not have an equal size, the reference frequency loading factor is defined by an equation, Reference Loading Factor = quasi - orthogonal fundamental band ' s size + ( M - 1 ) × FRF × normal partial band ' s size entire frequency band ' s size { entire frequency band ' s size = FRF × quasi - orthogonal fundamental band ' s size + FRF × normal partial band ' s size FRF = i 2 + i · j + j 2 M = 2 , 3 , 4 , … i , j = 1 , 2 , 3 , … , in which “M” functions as a reference for band division, and is defined as an integer of two or more, and “FRF” denotes a basic frequency reuse factor.
9. The method as claimed in claim 1 , wherein the partial bands are allocated to each cell by taking into consideration a signal quality requested by the user or Signal to Interference-plus-Noise Ratios (SINRs) of users.
10. A system for using frequency resources in a multi-cell communication system, the system comprising: a base station, corresponding to a cell included in the multi-cell communication system, for using frequency resources based on a preset segment sequence, wherein the base station divides each of the available frequency bands into a series of partial bands based on a basic frequency reuse factor, sets a reference frequency loading factor by using the basic frequency reuse factor, defines a quasi-orthogonal fundamental band, which does not cause interference with adjacent cells at the reference frequency loading factor or less, from among the series of partial bands according to each cell, determines an allocation sequence so that the quasi-orthogonal fundamental band is first allocated according to each cell, and allocates the partial bands to each cell according to the allocation sequence upon a service request from a user, and wherein available frequency bands of each cell are equal to each other, each of the available frequency bands is divided into “A” number of segments, each segment is divided into “B” number of partial bands, each partial band is divided into “C” number of channels, and the segment sequence represents an order in which the “A” number of segments are used.
11. The system as claimed in claim 10 , wherein sizes of the partial bands are the same in each cell, and sizes of the segments are the same in each cell.
12. The system as claimed in claim 10 , wherein, when the “B” corresponds to an integer of two or more, the two or more segments exist in one of physically continuous positions and physically discontinuous positions.
13. The system as claimed in claim 10 , wherein, when the “C” corresponds to an integer of two or more, the two or more channels exist in one of physically continuous positions and physically discontinuous positions.
14. The system as claimed in claim 10 , wherein the segment sequence is determined by using a frequency reuse factor and a sectorization factor.
15. The system as claimed in claim 10 , wherein segments first used by the respective cells are orthogonal to each other between adjacent cells or sectors.
16. The system as claimed in claim 10 , wherein, when all the partial bands have an equal size, the reference frequency loading factor is defined by an equation, Reference Loading Factor = FRF + 1 M × FRF { FRF = i 2 + i · j + j 2 M = 2 , 3 , 4 , … i , j = 1 , 2 , 3 , … , in which “M” functions as a reference for band division, and is defined as an integer of two or more, and “FRF” denotes a basic frequency reuse factor.
17. The system as claimed in claim 10 , wherein, when all the partial bands do not have an equal size, the reference frequency loading factor is defined by an equation, Reference Loading Factor = quasi - orthogonal fundamental band ' s size + ( M - 1 ) × FRF × normal partial band ' s size entire frequency band ' s size { entire frequency band ' s size = FRF × quasi - orthogonal fundamental band ' s size + FRF × normal partial band ' s size FRF = i 2 + i · j + j 2 M = 2 , 3 , 4 , … i , j = 1 , 2 , 3 , … , in which “M” functions as a reference for band division, and is defined as an integer of two or more, and “FRF” denotes a basic frequency reuse factor.
18. The system as claimed in claim 10 , wherein the base station allocates the partial bands to each cell by taking into consideration a signal quality requested by the user or Signal to Interference-plus-Noise Ratios (SINRs) of users.
Unknown
June 19, 2012
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